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在“研究电源的输出功率”的实验中,我们很容易根据P～R图线得出结论,电源的输出功率P跟外电路电阻R的关系是:P先随R增大;
In the experiment of “study the output power of the power supply,” we can easily draw conclusions from the P ~ R graph. The relationship between the output power P of the power supply and the resistance R of the external circuit is: P increases with R first;